diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index d03fafbd..3d4615f6 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ 8.2, 8.3, 8.4 ]
+        php: [ 8.3, 8.4, 8.5 ]
         laravel: [ 11.*, 12.*, 13.* ]
         dependency-version: [ stable, lowest ]
         include:
@@ -28,12 +28,11 @@ jobs:
             testbench: ^10.0
           - laravel: 13.*
             testbench: ^11.0
-        exclude:
-          # Laravel 13 needs PHP 8.3 or newer
-          - laravel: 13.*
-            php: 8.2
 
-    timeout-minutes: 15
+    # A SchemaFetcherTest failure diffs two copies of the whole Linear schema,
+    # which PHPUnit takes about 15 minutes to render. Leave room for that, so a
+    # real failure is reported rather than cancelled at the timeout.
+    timeout-minutes: 30
 
     name: "PHP ${{ matrix.php }} / Laravel ${{ matrix.laravel }} (${{ matrix.dependency-version }})"
 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9169cfe9..00ed5f29 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,7 +17,8 @@ format. This project adheres to [Semantic Versioning](https://semver.org/spec/v2
 ### Changed
 
 -   Pending requests are now namespaced by kind, e.g. `Requests\Pending\Queries\PendingIssuesQueryRequest`.
--   Requires PHP 8.2+, Laravel 11+ and `spatie/laravel-data` 4.11+.
+-   Requires PHP 8.3+, Laravel 11+, `saloonphp/saloon` 4.0+ and `spatie/laravel-data` 4.11+.
+-   Guzzle 8 is now allowed alongside Guzzle 7.
 -   `LinearResponse::resolve()` returns `object` rather than `Data|Collection`, so union responses can narrow it to their interface.
 
 ### Fixed
@@ -30,7 +31,7 @@ format. This project adheres to [Semantic Versioning](https://semver.org/spec/v2
 -   Scalar list properties failed to hydrate under `spatie/laravel-data` 4.3 and newer.
 -   Input classes were generated with a name that did not match their file, and relied on PHP CS Fixer to rename them.
 -   `organizationInviteDetails` referred to a class that did not exist.
--   The lowest supported `saloonphp/saloon` did not have `MockClient::destroyGlobal()`, so the floor is now 3.5.
+-   The lowest supported `webonyx/graphql-php` dropped the reasons from `@deprecated` input fields when it round-tripped the schema, so a sync rewrote `local.graphql` even when nothing had changed. The floor is now 15.34.1.
 
 ### Removed
 
diff --git a/composer.json b/composer.json
index 708ac0a2..11473609 100755
--- a/composer.json
+++ b/composer.json
@@ -17,20 +17,20 @@
     "type": "library",
     "license": "MIT",
     "require": {
-        "php": "^8.2",
+        "php": "^8.3",
         "ext-json": "*",
         "illuminate/support": "^11.0|^12.0|^13.0",
-        "guzzlehttp/guzzle": "^7.8",
+        "guzzlehttp/guzzle": "^7.8|^8.0",
         "nikic/php-parser": "^5.0",
-        "saloonphp/saloon": "^3.5",
+        "saloonphp/saloon": "^4.0",
         "spatie/laravel-data": "^4.11",
-        "webonyx/graphql-php": "^15.10"
+        "webonyx/graphql-php": "^15.34.1"
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.34",
         "mockery/mockery": "^1.6",
         "orchestra/testbench": "^9.2|^10.0|^11.0",
-        "phpunit/phpunit": "^10.3|^11.0|^12.0"
+        "phpunit/phpunit": "^10.3|^11.0|^12.0|^13.0"
     },
     "autoload": {
         "psr-4": {